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Page 14
724-746-5500 | blackbox.com
Chapter 2: Over view
Table 2-2. LES421A components.
Number in Figure
2-1 or 2-2 Component Description
1(1) RJ-45 connector
Connects a standard Ethernet network drop using a straight-through RJ -45 male Ethernet c able.
2(1) 5-position terminal block connector
Connects to an RS-422 o r RS-485 ser ial device when the DB9 M (RS-232) conn ector is disabled.
3(1) DB9 male connector
Connects to an RS-232 serial device when the 5-position terminal block (RS-422/RS-485) is disabled.
4(1) 2-wire terminal block connector
Removable 2-position terminal b lock with +, -, and cha ssis ground connecti ons.
5(1) Serial Port LED
Flashes green when data is b eing transmitted or re ceived on the serial port.
Lights steady green when t he serial port is open.
6(1) Ethernet Link LED
Lights when a connection is made.
Flashes when there is data t raffic on the Ethernet link.
7(1) Ready LED
Lights green continuously when the unit is initializing.
Flashes once per second when the system is operating correctly.
Off when something is wrong, for example, another device uses the same IP address.
8(1) Reset button
Used to initiate a hardware res et, enter console mod e, or reload factory defaults.
2.4.2 2-Port Hardened Serial Server (LES422A)Figures 2-3 and 2-4 show the front and top panels of the LES422A. Table 2-3 describes its components.
4
4
1
2
2
7
6
7
3
Figures 2-3 and 2-4. LES422A front and top panels.